diff --git a/core/common/src/main/kotlin/com/willfp/libreforge/effects/Effects.kt b/core/common/src/main/kotlin/com/willfp/libreforge/effects/Effects.kt
index 124b5cf8d..5b92bfb74 100644
--- a/core/common/src/main/kotlin/com/willfp/libreforge/effects/Effects.kt
+++ b/core/common/src/main/kotlin/com/willfp/libreforge/effects/Effects.kt
@@ -157,6 +157,7 @@ import com.willfp.libreforge.effects.impl.EffectSetItemData
 import com.willfp.libreforge.effects.impl.EffectSetItemPoints
 import com.willfp.libreforge.effects.impl.EffectSetPoints
 import com.willfp.libreforge.effects.impl.EffectSetSaturation
+import com.willfp.libreforge.effects.impl.EffectSetUnbreakable
 import com.willfp.libreforge.effects.impl.EffectSetVelocity
 import com.willfp.libreforge.effects.impl.EffectSetVictimVelocity
 import com.willfp.libreforge.effects.impl.EffectShoot
@@ -616,6 +617,7 @@ object Effects : Registry<Effect<*>>() {
         register(EffectSetItemPoints)
         register(EffectSetPoints)
         register(EffectSetSaturation)
+        register(EffectSetUnbreakable)
         register(EffectSetVelocity)
         register(EffectSetVictimVelocity)
         register(EffectShoot)
diff --git a/core/common/src/main/kotlin/com/willfp/libreforge/effects/impl/EffectSetUnbreakable.kt b/core/common/src/main/kotlin/com/willfp/libreforge/effects/impl/EffectSetUnbreakable.kt
new file mode 100644
index 000000000..9563147ed
--- /dev/null
+++ b/core/common/src/main/kotlin/com/willfp/libreforge/effects/impl/EffectSetUnbreakable.kt
@@ -0,0 +1,83 @@
+package com.willfp.libreforge.effects.impl
+
+import com.willfp.eco.core.config.interfaces.Config
+import com.willfp.libreforge.ConfigWarning
+import com.willfp.libreforge.Dispatcher
+import com.willfp.libreforge.NoCompileData
+import com.willfp.libreforge.ProvidedHolder
+import com.willfp.libreforge.ViolationContext
+import com.willfp.libreforge.effects.Effect
+import com.willfp.libreforge.effects.Identifiers
+import com.willfp.libreforge.get
+import com.willfp.libreforge.getProvider
+import com.willfp.libreforge.triggers.TriggerData
+import org.bukkit.Material
+import org.bukkit.entity.Player
+import org.bukkit.inventory.ItemStack
+import java.util.UUID
+
+object EffectSetUnbreakable : Effect<NoCompileData>("set_unbreakable") {
+    private val VALID_SLOTS = setOf("holder", "mainhand", "offhand", "helmet", "chestplate", "leggings", "boots")
+
+    private data class EnabledState(val slot: String, val persistOnDisable: Boolean)
+    private val enabledStates = HashMap<UUID, EnabledState>()
+
+    override fun makeCompileData(config: Config, context: ViolationContext): NoCompileData {
+        val slot = config.getStringOrNull("slot")
+        if (slot != null && slot.lowercase() !in VALID_SLOTS) {
+            context.log(
+                this,
+                ConfigWarning("slot", "Unknown slot '$slot'. Valid values: ${VALID_SLOTS.joinToString()}")
+            )
+        }
+        return NoCompileData
+    }
+
+    override fun onEnable(
+        dispatcher: Dispatcher<*>,
+        config: Config,
+        identifiers: Identifiers,
+        holder: ProvidedHolder,
+        compileData: NoCompileData
+    ) {
+        val value = config.getBoolOrNull("value") ?: true
+        val slot = config.getStringOrNull("slot") ?: "holder"
+        val persistOnDisable = config.getBoolOrNull("persist_on_disable") ?: true
+
+        enabledStates[identifiers.uuid] = EnabledState(slot, persistOnDisable)
+
+        val player = dispatcher.get<Player>()
+        val item = resolveItem(slot, player, holder) ?: return
+        applyUnbreakable(item, value)
+    }
+
+    override fun onDisable(dispatcher: Dispatcher<*>, identifiers: Identifiers, holder: ProvidedHolder) {
+        val state = enabledStates.remove(identifiers.uuid) ?: return
+        if (state.persistOnDisable) return
+
+        val player = dispatcher.get<Player>()
+        val item = resolveItem(state.slot, player, holder) ?: return
+        applyUnbreakable(item, false)
+    }
+
+    private fun resolveItem(slot: String, player: Player?, holder: ProvidedHolder): ItemStack? {
+        val item = when (slot.lowercase()) {
+            "holder" -> holder.getProvider<ItemStack>()
+            "mainhand" -> player?.equipment?.itemInMainHand
+            "offhand" -> player?.equipment?.itemInOffHand
+            "helmet" -> player?.equipment?.helmet
+            "chestplate" -> player?.equipment?.chestplate
+            "leggings" -> player?.equipment?.leggings
+            "boots" -> player?.equipment?.boots
+            else -> null
+        }
+        return item?.takeIf { it.type != Material.AIR }
+    }
+
+    private fun applyUnbreakable(item: ItemStack, value: Boolean): Boolean {
+        val meta = item.itemMeta ?: return false
+        meta.isUnbreakable = value
+        item.itemMeta = meta
+        return true
+    }
+}
\ No newline at end of file